Hard water in North Aurora, IL
Reported by North Aurora · February 2024
- IL typical
- 139 mg/L
- EPA health violations since 2016
- 0
- Softener for 3 people
- 24k grain
- Data
- Utility report
Tap water in North Aurora has about 238 mg/L of hardness, which is 13.9 grains per gallon. On the USGS scale that counts as very hard. The number comes from North Aurora, dated February 2024.
North Aurora sits 99 mg/L above the typical Illinois figure of 139. Of the 10 nearest cities we track, 4 have softer water and 6 have harder. The range nearby runs from 215 mg/L in St. Charles to 474 in Warrenville.
What 238 mg/L means at home
Scale forms fast here. Kettles and coffee makers need regular descaling, and showerheads clog unless you clean them.
Tank water heaters collect mineral sediment that insulates the water from the burner, so flushing the tank matters more than usual.
Dishes and glass shower doors spot easily. Soap scum and a dull film on hair or laundry are common complaints.
Hardness is not a health problem, and EPA sets no limit for it. It is a matter of scale and soap.
What to do about it
At 238 mg/L most of the trouble is scale, and only a few things deal with it.
Ion-exchange water softener
The standard whole-house fix. It swaps calcium and magnesium for sodium or potassium and needs salt plus a drain. Size it with the calculator below.
Salt-free conditioner
No salt and no drain line. It changes how minerals form scale instead of removing them, so water still tests hard.
Reverse osmosis or carbon filter
Under-sink reverse osmosis removes minerals from drinking water only. Plain carbon filters improve taste but do not soften.
3 people × 75 gallons a day × 13.9 gpg = 3,132 grains a day. A 24,000-grain unit regenerates about every 7 days.
EPA record for North Aurora's water system
No health-based violations since 2016
Serves about 18,261 people from groundwater.
- Health-based
- 0
- Monitoring or reporting
- 0
- Open now
- 0
Health-based means a contaminant above its legal limit or a missed treatment step. Monitoring and reporting violations are late or missing tests and notices. Source: EPA ECHO, 2026Q3 export, violations with periods starting 2016 or later. Full EPA record.
Questions
Is North Aurora water hard?
Yes. It measures about 238 mg/L (13.9 grains per gallon), which the USGS classes as very hard.
What is the water hardness in North Aurora in grains per gallon?
About 13.9 gpg. One grain per gallon equals 17.1 mg/L, so 238 mg/L divided by 17.1 gives 13.9.
What size water softener do I need in North Aurora?
For 3 people using 75 gallons each per day, 13.9 gpg works out to about 3,132 grains a day. A 24,000-grain softener covers that with a regeneration about every 7 days.
Has the North Aurora water system had EPA violations?
EPA records show no health-based violations for North Aurora since 2016.
Nearby cities
- Batavia358 mg/LVery hard
- Aurora287 mg/LVery hard
- Geneva320 mg/LVery hard
- Sugar Grove419 mg/LVery hard
- Boulder Hill235 mg/LVery hard
- St. Charles215 mg/LVery hard
- Warrenville474 mg/LVery hard
- Elburn232 mg/LVery hard
- West Chicago287 mg/LVery hard
- Oswego235 mg/LVery hard
Hardness data: TapWaterData US Water Hardness (utility report, February 26, 2024), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.